Method for transmitting and receiving signal by terminal supporting dual-connectivity between E-UTRA and NR and terminal performing the method

ABSTRACT

Provided is a method for transmitting and receiving a signal by a terminal supporting dual-connectivity between evolved universal terrestrial radio access (E-UTRA) and new radio (NR). In the method, when the E-UTRA uses at least one of E-UTRA operating bands 1, 3, 5, and 7, when the NR uses one of NR operating bands n77, n78, and n79, when an uplink center frequency of a first operating band among the E-UTRA operating bands and the NR operating bands is a first value, and when a downlink center frequency of the first operating band is a second value, a predetermined maximum sensitivity degradation (MSD) is applied to reference sensitivity used for reception of the downlink signal.

This application is a continuation application of U.S. patentapplication Ser. No. 16/317,071 filed on Jan. 11, 2019, which is aNational Stage Entry of International Application No. PCT/KR2018/012047filed on Oct. 12, 2018, and claims priority to U.S. ProvisionalApplication No. 62/585,561 filed on Nov. 14, 2017, all of which arehereby incorporated by reference in their entireties as if fully setforth herein.

BACKGROUND OF THE INVENTION Field of the Invention

The present invention relates to mobile communication.

Related Art

With the success of long term evolution (LTE)/LTE-A (LTE-Advanced) forthe 4th generation mobile communication, more interest is rising to thenext generation, i.e., 5th generation (also known as 5G) mobilecommunication and extensive research and development are being carriedout accordingly

The 5^(th)-generation mobile telecommunications defined by theInternational Telecommunication Union (ITU) refers to providing a datatransfer rate of up to 20 Gbps and a perceptible transfer rate of atleast 100 Mbps anywhere. The 5^(th)-generation mobiletelecommunications, whose official name is ‘IMT-2020’, is aimed to becommercialized worldwide in 2020.

ITU proposes three usage scenarios, for example, enhanced mobilebroadband (eMBB), massive machine type communication (mMTC), andultra-reliable and low latency communications (URLLC).

First, URLLC relates to a usage scenario which requires high reliabilityand low latency. For example, services such as autonomous driving,factory automation, augmented reality require high reliability and lowlatency (e.g., a delay time of 1 ms or less). Currently, latency of 4G(LTE) is statistically 21 to 43 ms (best 10%) and 33 to 75 ms (median).This is not enough to support a service requiring latency of 1 ms orless.

Next, the eMBB usage scenario refers to a usage scenario requiringmobile ultra-wideband. This ultra-wideband high-speed service isunlikely to be accommodated by core networks designed for existingLTE/LTE-A. Thus, in the so-called 5^(th)-generation mobilecommunication, core networks are urgently required to be re-designed.

Meanwhile, in the 5th generation mobile communication, a scheme (EN-DC)of dually connecting LTE and NR is underway to ensure communicationstability. However, in a state in which a downlink carrier using LTE anda downlink carrier using NR are aggregated, transmission of an uplinksignal may cause a harmonic component and an intermodulation distortion(IMD) component to impact on a downlink band of a terminal itself.

SUMMARY OF THE INVENTION

In an aspect, provided is a method for transmitting and receiving asignal by a terminal supporting dual-connectivity between evolveduniversal terrestrial radio access (E-UTRA) and new radio (NR). Themethod may comprise transmitting an uplink signal usingdual-connectivity between the E-UTRA and the NR; and receiving adownlink signal using the dual-connectivity, wherein the E-UTRA uses atleast one of E-UTRA operating bands 1, 3, 5, and 7, wherein the NR usesone of NR operating bands n77, n78, and n79, wherein when an uplinkcenter frequency of a first operating band among the E-UTRA operatingbands and the NR operating bands is a first value, and a downlink centerfrequency of the first operating band is a second value, a predeterminedmaximum sensitivity degradation (MSD) is applied to referencesensitivity used for reception of the downlink signal, and wherein whenthe E-UTRA uses the E-UTRA operating bands 1 and 3, the NR uses the NRoperating band n77, the first operating band is the E-UTRA operatingband 3, the first value 1712.5 MHz, and the second value is 1807.5 MHz,the MSD value is 31.5 dB.

In another aspect, provided is also a terminal supportingdual-connectivity between evolved universal terrestrial radio access(E-UTRA) and new radio (NR). The terminal may comprise a transceivertransmitting an uplink signal and receiving a downlink signal using thedual-connectivity; and a processor controlling the transceiver, whereinthe E-UTRA uses at least one of E-UTRA operating bands 1, 3, 5, and 7,wherein the NR uses one of NR operating bands n77, n78, and n79, whereinan uplink center frequency of a first operating band among the E-UTRAoperating bands and the NR operating bands is a first value, and adownlink center frequency of the first operating band is a second value,a predetermined maximum sensitivity degradation (MSD) is applied toreference sensitivity used for reception of the downlink signal.

When the E-UTRA uses the E-UTRA operating band 5, the NR uses the NRoperating band n78, the first operating band is the E-UTRA operatingband 5, the first value is 844 MHz, and the second value is 889 MHz, theMSD value is 8.3 dB.

When the E-UTRA uses the E-UTRA operating bands 1 and 3, the NR uses theNR operating band n77, the first operating band is the E-UTRA operatingband 3, the first value is 1712.5 MHz, and the second value is 1807.5MHz, the MSD value is 31.5 dB.

When the E-UTRA uses the E-UTRA operating bands 1 and 3, the NR uses theNR operating band n77, the first operating band is the E-UTRA operatingband 1, the first value is 1950 MHz, and the second value is 2140 MHz,the MSD value is 31.0 dB.

When the E-UTRA uses the E-UTRA operating bands 1 and 3, the NR uses theNR operating band n78, the first operating band is the E-UTRA operatingband 3, the first value is 1712.5 MHz, and the second value is 1807.5MHz, the MSD value is 31.2 dB.

When the E-UTRA uses the E-UTRA operating bands 5 and 7, the NR uses theNR operating band n78, the first operating band is the E-UTRA operatingband 7, the first value is 2525 MHz, and the second value is 2645 MHz,the MSD value is 30.1 dB.

When the E-UTRA uses the E-UTRA operating bands 5 and 7, the NR uses theNR operating band n78, the first operating band is the E-UTRA operatingband 5, the first value is 834 MHz, and the second value is 879 MHz, theMSD value is 30.2 dB.

When the E-UTRA uses the E-UTRA operating bands 1 and 5, the NR uses theNR operating band n78, the first operating band is the E-UTRA operatingband 1, the first value is 1932 MHz, and the second value is 2122 MHz,the MSD value is 18.1 dB.

When the E-UTRA uses the E-UTRA operating bands 1 and 3, the NR uses theNR operating band n77, the first operating band is the E-UTRA operatingband 3, the first value is 1775 MHz, and the second value is 1870 MHz,the MSD value is 8.5 dB.

When the E-UTRA uses the E-UTRA operating bands 1 and 7, the NR uses theNR operating band n78, the first operating band is the E-UTRA operatingband 7, the first value is 2507.5 MHz, and the second value is 2627.5MHz, the MSD value is 9.1 dB.

When the E-UTRA uses the E-UTRA operating bands 1 and 3, the NR uses theNR operating band n78, the first operating band is the E-UTRA operatingband 1, the first value is 1935 MHz, and the second value is 2125 MHz,the MSD value is 2.8 dB.

When the E-UTRA uses the E-UTRA operating bands 1 and 3, the NR uses theNR operating band n79, the first operating band is the E-UTRA operatingband 1, the first value is 1950 MHz, and the second value is 2140 MHz,the MSD value is 3.6 dB.

When the E-UTRA uses the E-UTRA operating bands 1 and 5, the NR uses theNR operating band n78, the first operating band is the E-UTRA operatingband 5, the first value is 840 MHz, and the second value is 885 MHz, theMSD value is 3.1 dB.

When the E-UTRA uses the E-UTRA operating bands 5 and 7, the NR uses theNR operating band n78, the first operating band is the E-UTRA operatingband 5, the first value is 830 MHz, and the second value is 875 MHz, theMSD value is 3.3 dB.

According to a disclosure of the present invention, the above problem ofthe related art is solved.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 illustrates a wireless communication system.

FIG. 2 illustrates the architecture of a radio frame according tofrequency division duplex (FDD) of 3rd generation partnership project(3GPP) long term evolution (LTE).

FIG. 3 illustrates an example resource grid for one uplink or downlinkslot in 3GPP LTE.

FIG. 4 illustrates the architecture of a downlink subframe.

FIG. 5 illustrates the architecture of an uplink subframe in 3GPP LTE.

FIGS. 6A and 6B are conceptual views illustrating intra-band carrieraggregation (CA).

FIGS. 7A and 7B are conceptual views illustrating inter-band carrieraggregation (CA).

FIG. 8 illustrates a situation where a harmonic component andintermodulation distortion (IMD) are introduced into downlink band whenuplink signal is transmitted through two uplink carriers.

FIG. 9 illustrates an example of operating bands used in each continent.

FIG. 10 is a flowchart of the present disclosure.

FIG. 11 illustrates an example of the present disclosure.

FIG. 12 is a block diagram illustrating a wireless communication systemin which a disclosure of the present specification is implemented.

FIG. 13 is a detailed block diagram of a transceiver included in thewireless device shown in FIG. 12.

DESCRIPTION OF EXEMPLARY EMBODIMENTS

Hereinafter, based on 3rd Generation Partnership Project (3GPP) longterm evolution (LTE) or 3GPP LTE-advanced (LTE-A), the present inventionwill be applied. This is just an example, and the present invention maybe applied to various wireless communication systems. Hereinafter, LTEincludes LTE and/or LTE-A.

The technical terms used herein are used to merely describe specificembodiments and should not be construed as limiting the presentinvention. Further, the technical terms used herein should be, unlessdefined otherwise, interpreted as having meanings generally understoodby those skilled in the art but not too broadly or too narrowly.Further, the technical terms used herein, which are determined not toexactly represent the spirit of the invention, should be replaced by orunderstood by such technical terms as being able to be exactlyunderstood by those skilled in the art. Further, the general terms usedherein should be interpreted in the context as defined in thedictionary, but not in an excessively narrowed manner.

The expression of the singular number in the specification includes themeaning of the plural number unless the meaning of the singular numberis definitely different from that of the plural number in the context.In the following description, the term ‘include’ or ‘have’ may representthe existence of a feature, a number, a step, an operation, a component,a part or the combination thereof described in the specification, andmay not exclude the existence or addition of another feature, anothernumber, another step, another operation, another component, another partor the combination thereof.

The terms ‘first’ and ‘second’ are used for the purpose of explanationabout various components, and the components are not limited to theterms ‘first’ and ‘second’. The terms ‘first’ and ‘second’ are only usedto distinguish one component from another component. For example, afirst component may be named as a second component without deviatingfrom the scope of the present invention.

It will be understood that when an element or layer is referred to asbeing “connected to” or “coupled to” another element or layer, it may bedirectly connected or coupled to the other element or layer orintervening elements or layers may be present. In contrast, when anelement is referred to as being “directly connected to” or “directlycoupled to” another element or layer, there are no intervening elementsor layers present.

Hereinafter, exemplary embodiments of the present invention will bedescribed in greater detail with reference to the accompanying drawings.In describing the present invention, for ease of understanding, the samereference numerals are used to denote the same components throughout thedrawings, and repetitive description on the same components will beomitted. Detailed description on well-known arts which are determined tomake the gist of the invention unclear will be omitted. The accompanyingdrawings are provided to merely make the spirit of the invention readilyunderstood, but not should be intended to be limiting of the invention.It should be understood that the spirit of the invention may be expandedto its modifications, replacements or equivalents in addition to what isshown in the drawings.

As used herein, ‘base station’ generally refers to a fixed station thatcommunicates with a wireless device and may be denoted by other termssuch as eNB (evolved-NodeB), BTS (base transceiver system), or accesspoint.

As used herein, user equipment (UE) may be stationary or mobile, and maybe denoted by other terms such as device, wireless device, terminal, MS(mobile station), UT (user terminal), SS (subscriber station), MT(mobile terminal) and etc.

FIG. 1 illustrates a wireless communication system.

Referring to FIG. 1, the wireless communication system includes at leastone base station (BS) 20. Respective BSs 20 provide a communicationservice to particular geographical areas 20 a, 20 b, and 20 c (which aregenerally called cells).

The UE generally belongs to one cell and the cell to which the terminalbelong is referred to as a serving cell. A base station that providesthe communication service to the serving cell is referred to as aserving BS. Since the wireless communication system is a cellularsystem, another cell that neighbors to the serving cell is present.Another cell which neighbors to the serving cell is referred to aneighbor cell. A base station that provides the communication service tothe neighbor cell is referred to as a neighbor BS. The serving cell andthe neighbor cell are relatively decided based on the UE.

Hereinafter, a downlink means communication from the base station 20 tothe terminal 10 and an uplink means communication from the terminal 10to the base station 20. In the downlink, a transmitter may be a part ofthe base station 20 and a receiver may be a part of the terminal 10. Inthe uplink, the transmitter may be a part of the terminal 10 and thereceiver may be a part of the base station 20.

Hereinafter, the LTE system will be described in detail.

FIG. 2 shows a downlink radio frame structure according to FDD of 3rdgeneration partnership project (3GPP) long term evolution (LTE).

The radio frame of FIG. 2 may be found in the section 5 of 3GPP TS36.211 V10.4.0 (2011-12) “Evolved Universal Terrestrial Radio Access(E-UTRA); Physical Channels and Modulation (Release 10)”.

Referring to FIG. 2, the radio frame consists of 10 subframes. Onesubframe consists of two slots. Slots included in the radio frame arenumbered with slot numbers 0 to 19. A time required to transmit onesubframe is defined as a transmission time interval (TTI). The TTI maybe a scheduling unit for data transmission. For example, one radio framemay have a length of 10 milliseconds (ms), one subframe may have alength of 1 ms, and one slot may have a length of 0.5 ms.

The structure of the radio frame is for exemplary purposes only, andthus the number of subframes included in the radio frame or the numberof slots included in the subframe may change variously.

Meanwhile, one slot may include a plurality of OFDM symbols. The numberof OFDM symbols included in one slot may vary depending on a cyclicprefix (CP).

FIG. 3 illustrates an example resource grid for one uplink or downlinkslot in 3GPP LTE.

Referring to FIG. 3, the uplink slot includes a plurality of OFDM(orthogonal frequency division multiplexing) symbols in the time domainand NRB resource blocks (RBs) in the frequency domain. For example, inthe LTE system, the number of resource blocks (RBs), i.e., NRB, may beone from 6 to 110.

Resource block (RB) is a resource allocation unit and includes aplurality of sub-carriers in one slot. For example, if one slot includesseven OFDM symbols in the time domain and the resource block includes 12sub-carriers in the frequency domain, one resource block may include7×12 resource elements (REs).

Meanwhile, the number of sub-carriers in one OFDM symbol may be one of128, 256, 512, 1024, 1536, and 2048.

In 3GPP LTE, the resource grid for one uplink slot shown in FIG. 4 mayalso apply to the resource grid for the downlink slot.

FIG. 4 illustrates the architecture of a downlink sub-frame.

In FIG. 4, assuming the normal CP, one slot includes seven OFDM symbols,by way of example.

The DL (downlink) sub-frame is split into a control region and a dataregion in the time domain. The control region includes up to first threeOFDM symbols in the first slot of the sub-frame. However, the number ofOFDM symbols included in the control region may be changed. A PDCCH(physical downlink control channel) and other control channels areallocated to the control region, and a PDSCH is allocated to the dataregion.

The physical channels in 3GPP LTE may be classified into data channelssuch as PDSCH (physical downlink shared channel) and PUSCH (physicaluplink shared channel) and control channels such as PDCCH (physicaldownlink control channel), PCFICH (physical control format indicatorchannel), PHICH (physical hybrid-ARQ indicator channel) and PUCCH(physical uplink control channel).

The PCFICH transmitted in the first OFDM symbol of the sub-frame carriesCIF (control format indicator) regarding the number (i.e., size of thecontrol region) of OFDM symbols used for transmission of controlchannels in the sub-frame. The wireless device first receives the CIF onthe PCFICH and then monitors the PDCCH.

Unlike the PDCCH, the PCFICH is transmitted through a fixed PCFICHresource in the sub-frame without using blind decoding. The PHICHcarries an ACK (positive-acknowledgement)/NACK(negative-acknowledgement) signal for a UL HARQ (hybrid automatic repeatrequest). The ACK/NACK signal for UL (uplink) data on the PUSCHtransmitted by the wireless device is sent on the PHICH.

The PBCH (physical broadcast channel) is transmitted in the first fourOFDM symbols in the second slot of the first sub-frame of the radioframe. The PBCH carries system information necessary for the wirelessdevice to communicate with the base station, and the system informationtransmitted through the PBCH is denoted MIB (master information block).In comparison, system information transmitted on the PDSCH indicated bythe PDCCH is denoted SIB (system information block).

The PDCCH may carry activation of VoIP (voice over internet protocol)and a set of transmission power control commands for individual UEs insome UE group, resource allocation of an upper layer control messagesuch as a random access response transmitted on the PDSCH, systeminformation on DL-SCH, paging information on PCH, resource allocationinformation of UL-SCH (uplink shared channel), and resource allocationand transmission format of DL-SCH (downlink-shared channel). A pluralityof PDCCHs may be sent in the control region, and the terminal maymonitor the plurality of PDCCHs. The PDCCH is transmitted on one CCE(control channel element) or aggregation of some consecutive CCEs. TheCCE is a logical allocation unit used for providing a coding rate perradio channel's state to the PDCCH. The CCE corresponds to a pluralityof resource element groups. Depending on the relationship between thenumber of CCEs and coding rates provided by the CCEs, the format of thePDCCH and the possible number of PDCCHs are determined.

The control information transmitted through the PDCCH is denoteddownlink control information (DCI). The DCI may include resourceallocation of PDSCH (this is also referred to as DL (downlink) grant),resource allocation of PUSCH (this is also referred to as UL (uplink)grant), a set of transmission power control commands for individual UEsin some UE group, and/or activation of VoIP (Voice over InternetProtocol).

The base station determines a PDCCH format according to the DCI to besent to the terminal and adds a CRC (cyclic redundancy check) to controlinformation. The CRC is masked with a unique identifier (RNTI; radionetwork temporary identifier) depending on the owner or purpose of thePDCCH. In case the PDCCH is for a specific terminal, the terminal'sunique identifier, such as C-RNTI (cell-RNTI), may be masked to the CRC.Or, if the PDCCH is for a paging message, a paging indicator, forexample, P-RNTI (paging-RNTI) may be masked to the CRC. If the PDCCH isfor a system information block (SIB), a system information identifier,SI-RNTI (system information-RNTI), may be masked to the CRC. In order toindicate a random access response that is a response to the terminal'stransmission of a random access preamble, an RA-RNTI (randomaccess-RNTI) may be masked to the CRC.

In 3GPP LTE, blind decoding is used for detecting a PDCCH. The blinddecoding is a scheme of identifying whether a PDCCH is its own controlchannel by demasking a desired identifier to the CRC (cyclic redundancycheck) of a received PDCCH (this is referred to as candidate PDCCH) andchecking a CRC error. The base station determines a PDCCH formataccording to the DCI to be sent to the wireless device, then adds a CRCto the DCI, and masks a unique identifier (this is referred to as RNTI(radio network temporary identifier) to the CRC depending on the owneror purpose of the PDCCH.

The uplink channels include a PUSCH, a PUCCH, an SRS (Sounding ReferenceSignal), and a PRACH (physical random access channel).

FIG. 5 illustrates the architecture of an uplink sub-frame in 3GPP LTE.

Referring to FIG. 5, the uplink sub-frame may be separated into acontrol region and a data region in the frequency domain. The controlregion is assigned a PUCCH (physical uplink control channel) fortransmission of uplink control information. The data region is assigneda PUSCH (physical uplink shared channel) for transmission of data (insome cases, control information may also be transmitted).

The PUCCH for one terminal is assigned in resource block (RB) pair inthe sub-frame. The resource blocks in the resource block pair take updifferent sub-carriers in each of the first and second slots. Thefrequency occupied by the resource blocks in the resource block pairassigned to the PUCCH is varied with respect to a slot boundary. This isreferred to as the RB pair assigned to the PUCCH having beenfrequency-hopped at the slot boundary.

The terminal may obtain a frequency diversity gain by transmittinguplink control information through different sub-carriers over time. mis a location index that indicates a logical frequency domain locationof a resource block pair assigned to the PUCCH in the sub-frame.

The uplink control information transmitted on the PUCCH includes an HARQ(hybrid automatic repeat request), an ACK (acknowledgement)/NACK(non-acknowledgement), a CQI (channel quality indicator) indicating adownlink channel state, and an SR (scheduling request) that is an uplinkradio resource allocation request.

The PUSCH is mapped with a UL-SCH that is a transport channel. Theuplink data transmitted on the PUSCH may be a transport block that is adata block for the UL-SCH transmitted for the TTI. The transport blockmay be user information. Or, the uplink data may be multiplexed data.The multiplexed data may be data obtained by multiplexing the transportblock for the UL-SCH and control information. For example, the controlinformation multiplexed with the data may include a CQI, a PMI(precoding matrix indicator), an HARQ, and an RI (rank indicator). Or,the uplink data may consist only of control information.

<Carrier Aggregation: CA>

Hereinafter, a carrier aggregation system will be described.

The carrier aggregation (CA) system means aggregating multiple componentcarriers (CCs). By the carrier aggregation, the existing meaning of thecell is changed. According to the carrier aggregation, the cell may meana combination of a downlink component carrier and an uplink componentcarrier or a single downlink component carrier.

Further, in the carrier aggregation, the cell may be divided into aprimary cell, secondary cell, and a serving cell. The primary cell meansa cell that operates at a primary frequency and means a cell in whichthe UE performs an initial connection establishment procedure or aconnection reestablishment procedure with the base station or a cellindicated by the primary cell during a handover procedure. The secondarycell means a cell that operates at a secondary frequency and once an RRCconnection is established, the secondary cell is configured and is usedto provide an additional radio resource.

The carrier aggregation system may be divided into a continuous carrieraggregation system in which aggregated carriers are contiguous and anon-contiguous carrier aggregation system in which the aggregatedcarriers are separated from each other. Hereinafter, when the contiguousand non-contiguous carrier systems are just called the carrieraggregation system, it should be construed that the carrier aggregationsystem includes both a case in which the component carriers arecontiguous and a case in which the component carriers arenon-contiguous. The number of component carriers aggregated between thedownlink and the uplink may be differently set. A case in which thenumber of downlink CCs and the number of uplink CCs are the same as eachother is referred to as symmetric aggregation and a case in which thenumber of downlink CCs and the number of uplink CCs are different fromeach other is referred to as asymmetric aggregation.

Meanwhile, the carrier aggregation (CA) technologies, as describedabove, may be generally separated into an inter-band CA technology andan intra-band CA technology. The inter-band CA is a method thataggregates and uses CCs that are present in different bands from eachother, and the intra-band CA is a method that aggregates and uses CCs inthe same frequency band. Further, CA technologies are more specificallysplit into intra-band contiguous CA, intra-band non-contiguous CA, andinter-band non-contiguous CA.

FIGS. 6A and 6B are concept views illustrating intra-band carrieraggregation (CA).

FIG. 6A illustrates intra-band contiguous CA, and FIG. 6B illustratesintra-band non-contiguous CA.

LTE-advanced adds various schemes including uplink MIMO and carrieraggregation in order to realize high-speed wireless transmission. The CAthat is being discussed in LTE-advanced may be split into the intra-bandcontiguous CA shown in FIG. 6A and the intra-band non-contiguous CAshown in FIG. 6B.

FIGS. 7A and 7B are concept views illustrating inter-band carrieraggregation.

FIG. 7A illustrates a combination of a lower band and a higher band forinter-band CA, and FIG. 7B illustrates a combination of similarfrequency bands for inter-band CA.

In other words, the inter-band carrier aggregation may be separated intointer-band CA between carriers of a low band and a high band havingdifferent RF characteristics of inter-band CA as shown in FIG. 7A andinter-band CA of similar frequencies that may use a common RF terminalper component carrier due to similar RF (radio frequency)characteristics as shown in FIG. 7B.

TABLE 1 Operat- Uplink (UL) operating Downlink (DL) operating Du- ingband band plex Band FUL_low-FUL_high FDL_low-FDL_high Mode 1 1920MHz-1980 MHz 2110 MHz-2170 MHz FDD 2 1850 MHz-1910 MHz 1930 MHz-1990 MHzFDD 3 1710 MHz-1785 MHz 1805 MHz-1880 MHz FDD 4 1710 MHz-1755 MHz 2110MHz-2155 MHz FDD 5 824 MHz-849 MHz 869 MHz-894 MHz FDD 6 830 MHz-840 MHz875 MHz-885 MHz FDD 7 2500 MHz-2570 MHz 2620 MHz-2690 MHz FDD 8 880MHz-915 MHz 925 MHz-960 MHz FDD 9 1749.9 MHz-1784.9 MHz 1844.9MHz-1879.9 MHz FDD 10 1710 MHz-1770 MHz 2110 MHz-2170 MHz FDD 11 1427.9MHz-1447.9 MHz 1475.9 MHz-1495.9 MHz FDD 12 699 MHz-716 MHz 729 MHz-746MHz FDD 13 777 MHz-787 MHz 746 MHz-756 MHz FDD 14 788 MHz-798 MHz 758MHz-768 MHz FDD 15 Reserved Reserved FDD 16 Reserved Reserved FDD 17 704MHz-716 MHz 734 MHz-746 MHz FDD 18 815 MHz-830 MHz 860 MHz-875 MHz FDD19 830 MHz-845 MHz 875 MHz-890 MHz FDD 20 832 MHz-862 MHz 791 MHz-821MHz FDD 21 1447.9 MHz-1462.9 MHz 1495.9 MHz-1510.9 MHz FDD 22 3410MHz-3490 MHz 3510 MHz-3590 MHz FDD 23 2000 MHz-2020 MHz 2180 MHz-2200MHz FDD 24 1626.5 MHz-1660.5 MHz 1525 MHz-1559 MHz FDD 25 1850 MHz-1915MHz 1930 MHz-1995 MHz FDD 26 814 MHz-849 MHz 859 MHz-894 MHz FDD 27 807MHz-824 MHz 852 MHz-869 MHz FDD 28 703 MHz-748 MHz 758 MHz-803 MHz FDD29 N/A N/A 717 MHz-728 MHz FDD 30 2305 MHz-2315 MHz 2350 MHz-2360 MHzFDD 31 452.5 MHz-457.5 MHz 462.5 MHz-467.5 MHz FDD 32 N/A N/A 1452MHz-1496 MHz FDD . . . 33 1900 MHz-1920 MHz 1900 MHz-1920 MHz TDD 342010 MHz-2025 MHz 2010 MHz-2025 MHz TDD 35 1850 MHz-1910 MHz 1850MHz-1910 MHz TDD 36 1930 MHz-1990 MHz 1930 MHz-1990 MHz TDD 37 1910MHz-1930 MHz 1910 MHz-1930 MHz TDD 38 2570 MHz-2620 MHz 2570 MHz-2620MHz TDD 39 1880 MHz-1920 MHz 1880 MHz-1920 MHz TDD 40 2300 MHz-2400 MHz2300 MHz-2400 MHz TDD 41 2496 MHz-2690 MHz 2496 MHz-2690 MHz TDD 42 3400MHz-3600 MHz 3400 MHz-3600 MHz TDD 43 3600 MHz-3800 MHz 3600 MHz-3800MHz TDD 44 703 MHz-803 MHz 703 MHz-803 MHz TDD

TABLE 2 Uplink (UL) operating Downlink (DL) operating Operating bandband Duplex Band FUL_low-FUL_high FDL_low-FDL_high Mode  n1 1920MHz-1980 MHz 2110 MHz-2170 MHz FDD  n2 1850 MHz-1910 MHz 1930 MHz-1990MHz FDD  n3 1710 MHz-1785 MHz 1805 MHz-1880 MHz FDD  n5 824 MHz-849 MHz869 MHz-894 MHz FDD  n7 2500 MHz-2570 MHz 2620 MHz-2690 MHz FDD  n8 880MHz-915 MHz 925 MHz-960 MHz FDD n20 832 MHz-862 MHz 791 MHz-821 MHz FDDn28 703 MHz-748 MHz 758 MHz-803 MHz FDD n38 2570 MHz-2620 MHz 2570MHz-2620 MHz TDD n41 2496 MHz-2690 MHz 2496 MHz-2690 MHz TDD n50 1432MHz-1517 MHz 1432 MHz-1517 MHz TDD n51 1427 MHz-1432 MHz 1427 MHz-1432MHz TDD n66 1710 MHz-1780 MHz 2110 MHz-2200 MHz FDD n70 1695 MHz-1710MHz 1995 MHz-2020 MHz FDD n71 663 MHz-698 MHz 617 MHz-652 MHz FDD n741427 MHz-1470 MHz 1475 MHz-1518 MHz FDD n75 N/A 1432 MHz-1517 MHz SDLn76 N/A 1427 MHz-1432 MHz SDL n77 3300 MHz-4200 MHz 3300 MHz-4200 MHzTDD n78 3300 MHz-3800 MHz 3300 MHz-3800 MHz TDD n79 4400 MHz-5000 MHz4400 MHz-5000 MHz TDD n80 1710 MHz-1785 MHz N/A SUL n81 880 MHz-915 MHzN/A SUL n82 832 MHz-862 MHz N/A SUL n83 703 MHz-748 MHz N/A SUL n84 1920MHz-1980 MHz N/A SUL

When operating bands are fixed as illustrated in Table 1 and Table 2, afrequency allocation organization of each country may assign a specificfrequency to a service provider according to a situation of eachcountry.

Meanwhile, in the current 5G NR technology, a scheme (EN-DC) of duallyconnecting LTE and NR is underway to ensure communication stability.However, in a state in which a downlink carrier using LTE and a downlinkcarrier using NR are aggregated, transmission of an uplink signal maycause a harmonic component and an intermodulation distortion (IMD)component to impact on a downlink band of the UE itself.

Specifically, the UE must be set to satisfy a reference sensitivitypower level (REFSENS), which is minimum average power for each antennaport of the UE. However, in case that the harmonic component and/or theIMD component occurs, the REFSENS for the downlink signal may not besatisfied. That is, the REFSENS must be set such that throughput thereofis at least 95% of maximum throughput of a reference measurementchannel, but the occurrence of the harmonic component and/or the IMDcomponent may cause the throughput to fall below 95%.

Thus, it is determined whether the harmonic component and/or the IMDcomponent of the EN-DC terminal (or EN-DC user equipment (UE)) hasoccurred, and when the harmonic component and the IMD component of theEN-DC terminal has occurred, a maximum sensitivity degradation (MSD)value for a corresponding frequency band may be defined to allowrelaxation for the REFSENS in a reception band of the EN-DC terminalbased on a transmission signal of the EN-DC terminal. Here, the MSD ismaximum allowable degradation of REFSENS, and in a certain frequencyband, the REFSENS may be relaxed by the defined amount of MSD.

Accordingly, in the present disclosure, an MSD value for eliminating (orreducing) the harmonic component and IMD is proposed for a terminal setto aggregate two or more downlink carriers and two uplink carriers.

<Disclosure of Present Specification>

Hereinafter, in case that the UE transmits an uplink signal through twouplink carriers in an aggregation state of a plurality of downlinkcarriers and two uplink carriers, whether an interference is leaked to adownlink band of the UE is analyzed and a solution thereto issubsequently proposed.

FIG. 8 illustrates a situation where an uplink signal transmittedthrough an uplink band flows into an uplink band of the UE.

Referring to FIG. 8, in a state in which three downlink bands are set bycarrier aggregation and two uplink bands are set, when the UE transmitsan uplink signal through two uplink bands, the harmonic component andthe IMD component may be introduced into a downlink band of the UE. Inthis situation, an MSD value capable of correcting the REFSENS isproposed to prevent reception sensitivity of a downlink signal fromdeteriorating due to the harmonic component and/or the IMD component.

In addition, although the UE appropriately solves the problem, adegradation of a reception sensitivity level in the downlink band of theUE may not be completely prevented due to cross isolation and couplingloss due to the PCB, a scheme of alleviating the requirements that anexisting UE must meet.

FIG. 9 illustrates an example of operating bands used in each continent.

As illustrated in FIG. 9, in Europe, bands 1, 3, 7, 8, 20 and 28, amongthe E-UTRA operating bands according to Table 1, and bands n78 and n258,among the NR operating bands according to Table 2, may be used. In Asia,bands 1, 3, 5, 7, 8, 18, 19, 21, 39, 41, and 42, among the E-UTRAoperating bands according to Table 1, and bands n77 and n78, n79, andn258, the NR operating bands according to Table 2, may be used. In NorthAmerica, bands 2, 4, 5, 12, 13, 41, 65 and 71, among the E-UTRAoperating bands according to Table 1, and bands n257, n260, and n261,among the NR operating bands according to Table 2, may be used.

Details of the used frequency bands illustrated in FIG. 9 are summarizedin Table 3 below.

TABLE 3 Europe Asia North America E-UTRA  1 ◯ ◯ Operating  2 ◯ band  3 ◯◯  4 ◯  5 ◯ ◯  7 ◯ ◯  8 ◯ ◯ 12 ◯ 13 ◯ 18 ◯ 19 ◯ 20 ◯ 21 ◯ 28 ◯ 39 ◯ 41 ◯◯ 42 ◯ 65 ◯ 71 ◯ NR n77  ◯ Operating n78  ◯ ◯ band n79  ◯ n257  ◯ n258 ◯ ◯ n260  ◯ n261  ◯

Referring to FIGS. 9 and 3, different frequency bands are used in eachcontinent (region). In some cases, some frequency bands may be commonlyused in each continent. For example, the E-UTRA operating bands 1, 3, 7,and 8 are frequency bands commonly used in Europe and Asia, and E-UTRAoperating bands 5 and 41 are frequency bands commonly used in Asia andNorth America.

Meanwhile, the frequency bands used in each continent (region) are notlimited to FIG. 9 and Table 3. That is, a frequency band not shown inFIG. 9 and Table 3 may also be used in each continent (region).

I. First Disclosure

In the first disclosure, an MSD level for a 2DL/2UL dual connectivity(DC) band combination at 6 GHz or lower is proposed. In particular, inthe first disclosure, an MSD level according to an IMD for the followingband combinations is proposed.

-   -   4th IMD:DC_5A-n78A, DC_8A-n78A, DC_26A-n78A    -   5th IMD:DC_28A-n78A

The first disclosure provides an MSD value for supporting a DC operationwhen self-interference affects a reception frequency band thereof.

For NR, a shared antenna RF architecture for non-standalone (NSA)terminals of 6 GHz or lower, like an LTE systems, may be considered.Thus, a shared antenna RF architecture for a generic NSA DC terminal maybe considered to derive the MSD level. However, some DC bandcombinations for the NR DC terminal must consider a separate RFarchitecture which means a case where the operating frequency rangebetween the NR band and the LTE band overlap, like DC_42A-n77A,DC_42A-n78A and DC_41_n41A.

1. IMD Problem in LTE Band

Based on the coexistence analysis results for the NSA DC terminal, theMSD level for the following two cases may be determined.

-   -   4th IMD:DC_5A-n78A, DC_8A-n78A, DC_26A-n78A    -   5th IMD:DC_28A-n78A

2. MSD Value Based on IMD

Table 4 shows the UE RF front-end component parameters for deriving MSDlevels at 6 GHz or lower.

TABLE 4 UE ref. architecture Cascaded Diplexer Architecture DC_5A-n78A,DC_8A-n78A, DC_26A-n78A, DC_28A-n78A Component IP2 (dBm) IP3 (dBm) IP4(dBm) IP5 (dBm) Ant. Switch 112 68 55 55 Diplexer 115 87 55 55 Duplexer100 75 55 53 PA Forward 28.0 32 30 28 PA Reversed 40 30.5 30 30 LNA 10 00 −10

Table 5 shows an isolation level according to RF components.

TABLE 5 Isolation Parameter Value (dB) Comment Antenna to Antenna 10Main antenna to diversity antenna PA (out) to PA (in) 60 PCB isolation(PA forward mixing) Diplexer 25 High/low band isolation PA (out) to PA(out) 60 L-H/H-L cross-band PA (out) to PA (out) 50 H-H cross-band LNA(in) to PA (out) 60 L-H/H-L cross-band LNA (in) to PA (out) 50 H-Hcross-band Duplexer 50 Tx band rejection at Rx band

Here, the isolation level indicates how much the intensity of a signalis reduced at the corresponding frequency when passing through anelement or an antenna. For example, referring to Table 5, when thesignal is transmitted from an antenna to an antenna, strength thereofmay be reduced by 10 dB, and when a signal is received at thecorresponding frequency, strength thereof may be reduced by 50 dB andtransmitted.

Based on Table 4 and Table 5, the present disclosure proposes MSD levelsas shown in Table 6 and Table 7. Table 6 shows the proposed MSD forsolving the 4th IMD, and Table 7 shows the proposed MSD for solving the5th IMD.

TABLE 6 UL Fc UL BW UL DL Fc DL BW CF MSD DC bands UL DC IMD (MHz) (MHz)RB # (MHz) (MHz) (dB) (dB) DC_5A-n78A 5 IMD4 |fB78 − 844 5 25 889 5 1.38.3 n78 3*fB5| 3421 10 52 3421 10 N/A DC_8A-n78A 8 IMD4 |fB78 − 910 5 25955 5 1.3 8.4 n78 3*fB3| 3685 10 52 3685 10 N/A DC_26A-n78A 26  IMD4|fB78 − 819 5 25 864 5 1.7 9.0 n78 3*fB26| 3321 10 52 3321 10 N/A

TABLE 7 UL Fc UL BW UL DL Fc DL BW CF MSD DC bands UL DC IMD (MHz) (MHz)RB # (MHz) (MHz) (dB) (dB) DC_28A-n78A 28 IMD5 |fB78 − 733 5 25 788 50.7 3.2 n78 4*fB28| 3720 10 52 3720 10 N/A

Based on the test settings and proposed MSD levels set forth in Table 6and Table 7, the first disclosure proposes as follows.

Proposal 1: The proposed test configuration and MSD levels must beconsidered to meet the requirements for the MSD.

II. Second Disclosure

In the second disclosure, MSD levels for a 3DL/2UL DC band combinationof 6 GHz or lower are proposed. The DC band combination of 6 GHz orlower, which needs to be reviewed to solve the self-interferenceproblem, is as follows.

TABLE 8 E-UTRA Band/Channel bandwidth/NRB/Duplex mode EUTRA/NR DC DL ULEUTRA/ UL Fc UL/DL UL DL Fc MSD Duplex Source of configurationconfiguration NR band (MHz) BW (MHz) CLRB (MHz) (dB) mode IMD NOTEDC_1A-3A-n77A DC_1A-n77A 1 1950 5 25 2140 N/A FDD N/A 3 1712.5 5 251807.5 TBD IMD2 Case 2 n77 3757.5 10 52 3757.5 N/A TDD N/A DC_1A-n77A 11950 5 25 2140 N/A FDD N/A 3 1775 5 25 1870 TBD IMD4 Case 9 n77 3980 1052 3980 N/A TDD N/A DC_3A-n77A 1 1950 5 25 2140 TBD FDD IMD2 Case 1 31775 5 25 1870 N/A N/A n77 3915 10 52 3915 N/A TDD N/A DC_1A-3A-n78ADC_1A-n78A 1 1950 5 25 2140 N/A FDD N/A 3 1712.5 5 25 1807.5 TBD IMD2Case 2 n78 3757.5 10 52 3757.5 N/A TDD N/A DC_3A-n78A 1 1950 5 25 2140TBD FDD IMD5 Case 14 3 1775 5 25 1870 N/A N/A n78 3725 10 52 3725 N/ATDD N/A DC_1A-3A-n79A DC_3A-n79A 1 1950 5 25 2140 TBD FDD IMD5 Case 15 31775 5 25 1870 N/A N/A n79 4860 40 216 4860 N/A TDD N/A DC_1A-19A-n77ADC_19A-n77A 1 1940 5 25 2130 TBD FDD IMD3 Case 4 19  832.5 5 25 877.5N/A N/A DC_1A-19A-n78A DC_19A-n78A n77, n78 3795 10 52 3795 N/A TDD N/ADC_1A-19A-n79A DC_1A-n79A 1 1950 5 25 2140 N/A FDD N/A 19  837.5 5 25882.5 TBD IMD3 Case 5 n79 4782.5 40 216 4782.5 N/A TDD N/A DC_19A-n79A 11950 5 25 2140 TBD FDD IMD4 Case 10 19  837.5 5 25 882.5 N/A N/A n794652.5 40 216 4652.5 N/A TDD N/A DC_1A-21A-n77A DC_21A-n77A 1 1964.6 525 2154.6 TBD FDD IMD2 Case 3 21  1450.4 5 25 1498.4 N/A N/ADC_1A-21A-n78A DC_21A-n78A n77, n78 3605 10 52 3605 N/A TDD N/ADC_1A-n77A 1 1950 5 25 2140 N/A FDD N/A 21  1452 5 25 1500 TBD IMD5 Case16 DC_1A-n78A n77, n78 3675 10 52 3675 N/A TDD N/A DC_3A-19A-n79ADC_3A-n79A 3 1775 5 25 1870 N/A FDD N/A 19  840 5 25 885 TBD IMD3 Case 6n79 4435 40 216 4435 N/A TDD N/A DC_19A-n79A 3 1782.5 5 25 1877.5 TBDFDD IMD4 Case 11 19  842.5 5 25 887.5 N/A N/A n79 4420 40 216 4420 N/ATDD N/A DC_3A-21A-n77A DC_3A-n77A 3 1767.5 5 25 1862.5 N/A FDD N/A 21 1459.5 5 25 1507.5 TBD IMD4 Case 12 DC_3A-21A-n78A DC_3A-n78A n77, n783795 10 52 3795 N/A TDD N/A DC_3A-21A-n77A DC_21A-n77A 3 1771.6 5 251866.6 TBD FDD IMD5 Case 17 21  1450.4 5 25 1498.4 N/A N/A n77 3935 1052 3935 N/A TDD N/A DC_3A-21A-n79A DC_21A-n79A 3 1774.2 5 25 1869.2 TBDFDD IMD3 Case 7 21  1450.4 5 25 1498.4 N/A N/A n79 4770 40 216 4770 N/ATDD N/A DC_19A-21A-n77A DC_21A-n77A 19  837.5 5 25 882.5 TBD FDD IMD3Case 8 21  1450.4 5 25 1498.4 N/A N/A DC_19A-21A-n78A DC_21A-n78A n77,n78 3783.3 10 52 3783.3 N/A TDD N/A DC_19A-21A-n77A DC_19A-n77A 19 837.5 5 25 882.5 N/A FDD N/A 21  1454.5 5 25 1502.5 TBD IMD4 Case 13 n774015 10 52 4015 N/A TDD N/A DC_19A-21A-n79A DC_19A-n79A 19  837.5 5 25882.2 N/A FDD N/A 21  1452 5 25 1500 TBD IMD5 Case 18 n79 4850 40 2164850 N/A TDD N/A

In addition, some 3DL/2UL DC of following combinations may causeself-interference with respect to a third reception frequency band oftheir own.

-   -   2nd IMD:

3DL_DC_5A-7A-n78A w/ 2UL_DC_5A-n78A⋅2nd IMD into B7

3DL_DC_5A-7A-n78A w/ 2UL_DC_7A-n78A⋅2nd IMD into B5

-   -   3rd IMD:

3DL_DC_1A-5A-n78A w/ 2UL_DC_5A-n78A⋅3rd IMD into B1

-   -   4th IMD:

3DL_DC_1A-7A-n78A w/ 2UL_DC_1A-n78A⋅4th IMD into B7

3DL_DC_1A-7A-n78A w/ 2UL_DC_7A-n78A⋅4th IMD into B1

-   -   5th IMD:

3DL_DC_1A-5A-n78A w/ 2UL_DC_1A-n78A⋅5th IMD into B5

3DL_DC_5A-7A-n78A w/ 2UL_DC_7A-n78A⋅5th IMD into B5

In the case of 4DL/2UL DCs, the IMD problem may be solved in DC bandcombinations of a low frequency, like 3DL/2UL DC combo and 2DL/2UL DCcombo. Therefore, the 4DL/2UL DC combination and the 5DL/2UL DCcombination may not have the MSD problem like the LTE xDL/2UL CA bandcombination.

In order to support dual-connectivity between the NR band and the LTEE-UTRA band, it is necessary to analyze MSD values in the thirdreception frequency band according to self-interference. Thus, in thesecond disclosure, the MSD value in the 3DL/2UL NSA DC band combinationis provided.

Regarding NR, a shared antenna RF architecture for non-standalone (NSA)terminals of 6 GHz or lower, such as LTE systems, may be considered.Thus, a shared antenna RF architecture for a generic NSA DC terminal maybe considered to derive the MSD level. However, some DC bandcombinations for an NR DC terminal must consider a separate RFarchitecture which means a case where an operating frequency rangebetween the NR band and the LTE band overlap like DC_42A-n77A,DC_42A-n78A, and DC_41_n41A.

1. IMD Problem in Third LTD Band

Based on the coexistence analysis results for the NSA DC terminal, theMSD levels for the following four cases may be determined. When the MSDlevels are analyzed, a harmonic trap filter may be used.

-   -   2nd IMD:

3DL_DC_1A-3A-n77A w/ 2UL_DC_1A-n77A

3DL_DC_1A-3A-n77A w/ 2UL_DC_3A-n77A

3DL_DC_1A-3A-n78A w/ 2UL_DC_1A-n78A

3DL_DC_1A-21A-n77A w/ 2UL_DC_21A-n77A

3DL_DC_5A-7A-n78A w/ 2UL_DC_5A-n78A

3DL_DC_5A-7A-n78A w/ 2UL_DC_7A-n78A

-   -   3rd IMD:

3DL_DC_1A-19A-n77A w/ 2UL_DC_19A-n77A

3DL_DC_1A-19A-n79A w/ 2UL_DC_1A-n79A

3DL_DC_3A-19A-n79A w/ 2UL_DC_3A-n79A

3DL_DC_3A-21A-n79A w/ 2UL_DC_21A-n79A

3DL_DC_19A-21A-n77A w/ 2UL_DC_21A-n77A

3DL_DC_1A-5A-n78A w/ 2UL_DC_5A-n78A

-   -   4th IMD:

3DL_DC_1A-3A-n77A w/ 2UL_DC_1A-n77A

3DL_DC_1A-19A-n79A w/ 2UL_DC_19A-n79A

3DL_DC_3A-19A-n79A w/ 2UL_DC_19A-n79A

3DL_DC_3A-21A-n77A w/ 2UL_DC_3A-n77A

3DL_DC_19A-21A-n77A w/ 2UL_DC_19A-n77A

3DL_DC_1A-7A-n78A w/ 2UL_DC_1A-n78A

3DL_DC_1A-7A-n78A w/ 2UL_DC_7A-n78A

-   -   5th IMD:

3DL_DC_1A-3A-n78A w/ 2UL_DC_3A-n78A

3DL_DC_1A-3A-n79A w/ 2UL_DC_3A-n79A

3DL_DC_1A-21A-n77A w/ 2UL_DC_1A-n77A

3DL_DC_3A-21A-n77A w/ 2UL_DC_21A-n77A

3DL_DC_19A-21A-n79A w/ 2UL_DC_19A-n79A

3DL_DC_1A-5A-n78A w/ 2UL_DC_1A-n78A

3DL_DC_5A-7A-n78A w/ 2UL_DC_7A-n78A

2. MSD Value Based on IMD

Table 9 shows RF component isolation parameters for deriving the MSDlevel at 6 GHz lower. A shared antenna RF architecture for all DC bandcombinations in the list may be considered.

TABLE 9 UE ref. architecture Triplexer-Diplexer or Triplexer-QuadplexerArchitecture Triplexer-Quadplexer: DC_1A-3A-n77A, DC_1A-3A-n78A,DC_1A-3A-n79A, DC_3A-21A-n77A, DC_3A-21A-n79A Triplexer-Diplexer:DC_1A-19A-n77A, DC_1A-21A-n77A, DC_3A-19A-n79A, DC_19A-21A-n77A,DC_19A-21A-n79A, DC_1A-5A-n78A, DC_1A-7A-n78A, DC_5A-7A-n78A ComponentIP2 (dBm) IP3 (dBm) IP4 (dBm) IP5 (dBm) Ant. Switch 112 68 55 55Triplexer 115 82 55 55 Quadplexer 110 72 55 52 Diplexer 115 87 55 55Duplexer 100 75 55 53 PA Forward 28.0 32 30 28 PA Reversed 40 30.5 30 30LNA 10 0 0 −10

Table 10 shows isolation levels according to RF components.

TABLE 10 Isolation Parameter Value (dB) Comment Antenna to Antenna 10Main antenna to diversity antenna PA (out) to PA (in) 60 PCB isolation(PA forward mixing) Triplexer 20 High/low band isolation Quadplexer 20L-L or H-M band isolation Diplexer 25 High/low band isolation PA (out)to PA (out) 60 L-H/H-L cross-band PA (out) to PA (out) 50 H-H cross-bandLNA (in) to PA (out) 60 L-H/H-L cross-band LNA (in) to PA (out) 50 H-Hcross-band Duplexer 50 Tx band rejection at Rx band

Based on Table 9 and Table 10, MSD levels as shown in Table 11 to Table14 are proposed.

Table 11 shows the MSD proposed to solve the second IMD, Table 12 showsthe MSD proposed to solve the third IMD, Table 13 shows the MSD proposedto solve the fourth IMD, and Table 14 shows the MSD proposed to solvethe fifth IMD.

TABLE 11 UL Fc UL BW UL DL Fc DL BW CF MSD DC bands UL DC IMD (MHz)(MHz) RB # (MHz) (MHz) (dB) (dB) DC_1A-3A-n77A 1 IMD2 |fB77 − 1950 5 252140 5 2.5 N/A n77 fB1| 3757.5 10 52 3757.5 10 3 1712.5 5 25 1807.5 531.5 DC_1A-3A-n77A 3 IMD2 |fB77 − 1775 5 25 1870 5 2.5 N/A n77 fB3| 391510 52 3915 10 1 1950 5 25 2140 5 31.0 DC_1A-3A-n78A 1 |fB78 − 1950 5 252140 5 N/A n78 IMD2 fB1| 3757.5 10 52 3757.5 10 2.5 3 1712.5 5 25 1807.55 31.2 DC_1A-21A-n77A 21  |fB77 − 1450.4 5 25 1498.4 5 N/A n77 IMD2fB21| 3605 10 52 3605 10 2.3 1 1964.6 5 25 2154.6 5 30.6 DC_5A-7A-n78A 5|fB78 − 844 5 25 889 5 N/A n78 IMD2 fB5| 3489 10 52 3489 10 2.2 7 2525 525 2645 5 30.1 DC_5A-7A-n78A 7 |fB78 − 2550 5 25 2670 5 N/A n78 IMD2fB7| 3429 10 52 3429 10 2.2 5 834 5 25 879 5 30.2

TABLE 12 UL Fc UL BW UL DL Fc DL BW CF MSD DC bands UL DC IMD (MHz)(MHz) RB # (MHz) (MHz) (dB) (dB) DC_1A-19A-n77A 19  IMD3 |fB77 − 832.5 525 877.5 5 1.8 N/A n7 2*fB19| 3795 10 52 3795 10 7 1 1940 5 25 2130 517.8 DC_1A-19A-n79A 1 IMD3 |fB79 − 1950 5 25 2140 5 2.0 N/A n79 2*fB1|4782.5 40 216 4782.5 40 19  837.5 5 25 882.5 5 18.3 DC_3A-19A-n79A 3IMD3 |fB79 − 1775 5 25 1870 5 2.0 N/A n79 2*fB3| 4435 40 216 4435 40 19 840 5 25 885 5 18.5 DC_3A-21A-n79A 21  IMD3 |fB79 − 1450.4 5 25 1498.4 52.0 N/A n79 2*fB21| 4770 40 216 4770 40 3 1774.2 5 25 1869.2 5 17.8DC_19A-21A-n77A 21  IMD3 |fB77 − 1450.4 5 25 1498.4 5 2.2 N/A n772*fB21| 3783.3 10 52 3783.3 10 19  837.5 5 25 882.5 5 18.7 DC_1A-5A-n78A5 IMD3 |fB78 − 829 5 25 874 5 2.0 N/A n78 2*fB5| 3780 10 52 3780 10 11932 5 25 2122 5 18.1

TABLE 13 UL Fc UL BW UL DL Fc DL BW CF MSD DC bands UL DC IMD (MHz)(MHz) RB # (MHz) (MHz) (dB) (dB) DC_1A-3A-n77A 1 IMD4 |fB77 − 1950 5 252140 5 1.3 N/A n77 3*fB1| 3980 10 52 3980 10 3 1775 5 25 1870 5 8.5DC_1A-19A-n79A 19  IMD4 |fB79 − 837.5 5 25 882.5 5 1.2 N/A n79 3*fB19|4652.5 40 216 4652.5 40 1 1950 5 25 2140 5 8.1 DC_3A-19A-n79A 19  IMD4|fB79 − 842.5 5 25 887.5 5 0.0 N/A n79 3*fB19| 4420 40 216 4420 40 31782.5 5 25 1877.5 5 0.2 DC_3A-21A-n77A 3 IMD4 |fB77 − 1767.5 5 251862.5 5 1.5 N/A n77 3*fB3| 3795 10 52 3795 10 21  1459.5 5 25 1507.5 58.8 DC_19A-21A-n77A 19  IMD4 |fB77 − 837.5 5 25 882.5 5 1.7 N/A n773*fB19| 4015 10 52 4015 10 21  1454.5 5 25 1502.5 5 9.0 DC_1A-7A-n78A 1IMD4 |fB78 − 1977.5 5 25 2167.5 5 1.8 N/A n78 3*fB1| 3305 10 52 3305 107 2507.5 10 52 2627.5 10 9.1 DC_1A-7A-n78A 7 IMD4 |2*fB78 − 1975 5 252165 5 1.8 N/A n78 2*fB7| 3310 10 52 3310 10 1 2550 10 52 2670 10 8.6

TABLE 14 UL Fc UL BW UL DL Fc DL BW CF MSD DC bands UL DC IMD (MHz)(MHz) RB # (MHz) (MHz) (dB) (dB) DC_1A-3A-n78A 3 IMD5 |2*fB78 − 1775 525 1870 5 0.5 N/A n78 3*fB3| 3725 10 52 3725 10 1 1935 5 25 2125 5 2.8DC_1A-3A-n79A 3 IMD5 |fB79 − 1750 5 25 1845 5 0.7 N/A n79 4*fB3| 4860 40216 4860 40 1 1950 5 25 2140 5 3.6 DC_1A-21A-n77A 1 IMD5 |2*fB77 − 19505 25 2140 5 0.5 N/A n77 3*fB1| 3675 10 52 3675 10 21  1452 5 25 1500 52.9 DC_3A-21A-n77A 21  IMD5 |fB77 − 1450.4 5 25 1498.4 5 0.7 N/A n774*fB21| 3935 10 52 3935 10 3 1771.6 5 25 1866.6 5 3.4 DC_19A-21A-n79A19  IMD5 |fB79 − 837.5 5 25 882.2 5 0.7 N/A n79 4*fB19| 4850 40 216 485040 21  1452 5 25 1500 5 3.8 DC_1A-5A-n78A 1 IMD5 |2*fB78 − 1975 5 252165 5 0.5 N/A n78 3*fB1| 3405 10 52 3405 10 5 840 5 25 885 5 3.1DC_5A-7A-n78A 7 IMD5 |2*fB78 − 2525 5 25 2645 5 0.7 N/A n78 3*fB7| 335010 52 3350 10 5 830 5 25 875 5 3.3

Based on the test settings described in Table 11 to Table 14, MSD valuesmay be derived. Based on the test setting and the proposed MSD levelsdescribed in Table 11 to Table 14, the second disclosure is proposed asfollows.

-   -   Proposal 1: The 4DL/2UL, 5DL/2UL, and 6DL/2UL NSA DC band        combinations do not need to define the MSD such as the LTE xDL/2        UL CA band combination.    -   Proposal 2: The provided MSD test setting and MSD values may be        considered in defining the MSD requirements

FIG. 10 is a flowchart according to the present disclosure and FIG. 11illustrates an example according to the present disclosure.

Referring to FIG. 10, a terminal supporting dual-connectivity betweenE-UTRA and NR may preconfigure maximum sensitivity degradation (MSD)regarding reference sensitivity (REFSENS) to apply the same to receptionof a downlink signal (S1010). When receiving a downlink signal, theterminal may receive the downlink signal by applying the preconfiguredMSD value (S1020).

As described above with reference to FIG. 8, in the case of the terminal(or UE) supporting dual-connectivity between E-UTRA and NR, when theterminal transmits an uplink signal through two uplink bands, a harmoniccomponent (harmonics) and/or an intermodulation distortion (IMD)component generated according to a frequency band of the uplink signalmay be introduced to a downlink band of the terminal. Here, in order toprevent a degradation of reception sensitivity of the downlink signaldue to the harmonic component and/or the IMD component, the terminal mayapply maximum sensitivity degradation (MSD) correcting the REFSENS.

Here, the preset MSD may be the MSD value described in Table 6 and Table7 and Table 11 to Table 14. That is, when the conditions described inTable 6 and Table 7 and Table 11 to Table 14 are applied, the terminalmay receive the downlink signal by applying the proposed MSD value.

For example, referring to FIG. 11 and Table 11, when the terminalsupports dual-connectivity between the E-UTRA operating bands 1 and 3and the NR operating band n77, if an uplink center frequency of theE-UTRA operating band 3 is 1712.5 MHz and a downlink center frequency ofthe E-UTRA operating band 3 is 1807.5 MHz, the second IMD (IMD2) may beintroduced into the downlink operating band. Thus, in order to prevent adegradation of reception sensitivity of the downlink signal due to thesecond IMD component IMD2, the MSD value may be set to 31.5 dB tocorrect reference sensitivity.

Referring to Table 6, when the terminal supports dual-connectivitybetween the E-UTRA operating band 5 and the NR operating band n78, if anuplink center frequency of the E-UTRA operating band 5 is 844 MHz and adownlink center frequency of the UTRA operating band 5 is 889 MHz, afourth IMD (IMD4) may be introduced into the downlink operating band.Thus, in order to prevent a degradation of reception sensitivity of thedownlink signal due to the fourth IMD component IMD4, the MSD value maybe set to 8.3 dB to correct reference sensitivity.

FIG. 12 is a block diagram illustrating a wireless communication systemin accordance with one embodiment of the present disclosure.

Referring to FIG. 12, the wireless communication system includes atleast one user equipment (UE, 100) and base station (200).

The UE 100 includes a transceiver 110, a processor 120 and a memory 130.The memory 130 is connected with the processor 120 to store variouspieces of information for driving the processor 120. The transceiver 110is connected with the processor 120 to transmit and/or receive the radiosignal. The processor 120 implements a function, a process, and/or amethod which are proposed.

The UE 100 may support dual-connectivity between E-UTRA and NR. When theUE 100 is configured to aggregate at least two carriers, the processor120 may control the transceiver 110 to transmit the uplink signal usingthe uplink of the at least two carriers and receive the downlink signalusing the downlink of the at least two carriers.

If the at least two carriers include at least one of the E-UTRAoperating bands 1, 3, 5, and 7 and one of the NR operating bands n77,n78, and n79, the processor 120 may receive the downlink signal byapplying the preset MSD according to Table 6 and Table 7 and Table 11 toTable 14.

That is, in the case of the UE 100 supporting dual-connectivity betweenE-UTRA and NR, when the UE 100 transmits an uplink signal through twouplink bands, a harmonic component and/or the IMD component generatedaccording to a frequency band of the uplink signal may be introducedinto a downlink band of the UE 100, and thus, in order to prevent adegradation of reception sensitivity of the downlink signal due to theharmonic component and/or the IMD component, the UE 100 may receivedownlink signal by applying the MSD to correct the REFSENS.

Here, the preset MSD may be the MSD value described in Table 6 and Table7 and Table 11 to Table 14. That is, when the conditions described inTable 6 and Table 7 and Table 11 to Table 14 are applied, the UE 100 mayreceive the downlink signal by applying the proposed MSD value.

For example, referring to Table 11, when the UE supportsdual-connectivity between the E-UTRA operating band 1 and 5 and the NRoperating band n78, if an uplink center frequency of the E-UTRAoperating band 1 is 1932 MHz and a downlink center frequency of theE-UTRA operating band 1 is 2122 MHz, the third order IMD (IMD3) may beintroduced into the downlink operating band. Thus, in order to prevent adegradation of reception sensitivity of the downlink signal due to thethird IMD component IMD3, the MSD value may be set to 18.1 dB to correctthe reference sensitivity.

The base station 200 includes a transceiver 210, a processor 220 and amemory 220. The memory 230 is connected with the processor 220 to storevarious pieces of information for driving the processor 220. Thetransceiver 210 is connected with the processor 220 to transmit and/orreceive a radio signal. The processor 220 implements a function, aprocess, and/or a method which are proposed. In the aforementionedembodiment, the operation of the base station may be implemented by theprocessor 220.

The base station (BS) 200 may receive an uplink signal from the UE 100using the transceiver 210 and transmit a downlink signal to the UE 100using the transceiver 210. When the BS 200 transmits the downlinksignal, the UE 100 may receive the downlink signal using the preset MSDvalue according to Table 6 and Table 7 and Table 11 to Table 14.

The processor may include an application-specific integrated circuit(ASIC), another chip set, a logic circuit and/or a data processingapparatus. The memory may include a read-only memory (ROM), a randomaccess memory (RAM), a flash memory, a memory card, a storage medium,and/or other storage device. The RF unit may include a baseband circuitfor processing the radio signal. When the embodiment is implemented bysoftware, the aforementioned technique may be implemented by a module (aprocess, a function, and the like) that performs the aforementionedfunction. The module may be stored in the memory and executed by theprocessor. The memory may be positioned inside or outside the processorand connected with the processor by various well-known means.

In the aforementioned exemplary system, methods have been describedbased on flowcharts as a series of steps or blocks, but the methods arenot limited to the order of the steps of the present invention and anystep may occur in a step or an order different from or simultaneously asthe aforementioned step or order. Further, it may be appreciated bythose skilled in the art that steps shown in the flowcharts are notexclusive and other steps may be included or one or more steps do notinfluence the scope of the present invention and may be deleted.

FIG. 13 is a detailed block diagram of a transceiver included in thewireless device shown in FIG. 12.

Referring to FIG. 13, the transceiver (110) includes a transmitter (111)and a receiver (112). The transmitter (111) includes a Discrete FourierTransform (DFT) unit (1111), a subcarrier mapper (1112), an Inverse FastFourier Transform (IFFT) unit (1113), a CP inserter (1114), a radiotransmitter (1115). The transmitter (111) may further include amodulator. Also, for example, the transmitter (111) may further includea scramble unit (not shown), a modulation mapper (not shown), a layermapper (not shown), and a layer permutator (not shown), and these blocksmay be positioned before the DFT unit (1111). More specifically, inorder to prevent an increase in the peak-to-average power ratio (PAPR),the transmitter (111) allows information to pass through the DFT unit(1111) beforehand prior to mapping a signal to a subcarrier. Afterperforming subcarrier mapping, a signal that is spread (or precoded, inthe same sense) by the DFT unit (1111) through the subcarrier mapper(1112), a signal within a time axis is generated (or created) after theprocessed signal passes through the Inverse Fast Fourier Transform(IFFT) unit (1113).

The DFT unit (1111) performs DFT on the inputted symbols, therebyoutputting complex number symbols (complex-valued symbols). For example,if Ntx symbols are inputted (wherein Ntx is an integer), a DFT size isequal to Ntx. The DFT unit (1111) may also be referred to as a transformprecoder. The subcarrier mapper (1112) maps the complex number symbolsto each subcarrier of the frequency domain. The complex number symbolsmay be mapped to resource elements corresponding to resource blocksbeing assigned for data transmission. The subcarrier mapper (1112) mayalso be referred to as a resource element mapper. The IFFT unit (1113)performs IFFT on the inputted symbols, thereby outputting a basebandsignal for data, which correspond to a time domain signal. The CPinserter (1114) duplicates (or copies) an end part of the basebandsignal for the data and inserts the duplicated part to a front part ofthe baseband signal for the data. By performing CP insertion,Inter-Symbol Interference (ISI) and Inter-Carrier Interference (ICI) maybe prevented, thereby allowing orthogonality to be maintained even in amulti-path channel.

Meanwhile, the receiver (112) includes a radio receiver (1121), a CPremover (1122), a Fast Fourier Transform (FFT) unit (1123), and anequalizer (1124). The radio receiver (1121), the CP remover (1122), andthe FFT unit (1123) of the receiver (112) respectively perform theinverse functions of the radio transmitter (1115), the CP inserter(1114), and the IFFT unit (1113) of the transmitter (111). The receiver(112) may further include a demodulator.

What is claimed is:
 1. A terminal comprising: a transceiver configuredwith dual-connectivity between an evolved universal terrestrial radioaccess (E-UTRA) and a new radio (NR); and a processor controlling thetransceiver to perform a dual uplink operation, wherein the dual uplinkoperation generates an intermodulation product, wherein the E-UTRA isconfigured with at least one or two of E-UTRA operating bands 1, 3, 5,and 7, wherein the NR is configured with one of NR operating bands n77,n78, and n79; and wherein based on (i) an uplink center frequency of afirst operating band among the E-UTRA operating bands and the NRoperating bands being a first value, and based on (ii) a downlink centerfrequency of the first operating band being a second value, a referencesensitivity is allowed to be relaxed by a predetermined value formaximum sensitivity degradation (MSD).
 2. The terminal of claim 1,wherein when the E-UTRA is configured with the E-UTRA operating band 5,the NR is configured with the NR operating band n78, the first operatingband is the E-UTRA operating band 5, the first value is 844 MHz, thesecond value is 889 MHz, and the predetermined value for the MSD valueis 8.3 dB.
 3. The terminal of claim 1, wherein when the E-UTRA isconfigured with the E-UTRA operating bands 1 and 3, the NR is configuredwith the NR operating band n77, the first operating band is the E-UTRAoperating band 3, the first value is 1712.5 MHz, the second value is1807.5 MHz, and the predetermined value for the MSD value is 31.5 dB. 4.The terminal of claim 1, wherein when the E-UTRA is configured with theE-UTRA operating bands 1 and 3, the NR is configured with the NRoperating band n77, the first operating band is the E-UTRA operatingband 1, the first value is 1950 MHz, the second value is 2140 MHz, andthe predetermined value for the MSD value is 31.0 dB.
 5. The terminal ofclaim 1, wherein when the E-UTRA is configured with the E-UTRA operatingbands 1 and 3, the NR is configured with the NR operating band n78, thefirst operating band is the E-UTRA operating band 3, the first value is1712.5 MHz, the second value is 1807.5 MHz, and the predetermined valuefor the MSD value is 31.2 dB.
 6. The terminal of claim 1, wherein whenthe E-UTRA is configured with the E-UTRA operating bands 5 and 7, the NRis configured with the NR operating band n78, the first operating bandis the E-UTRA operating band 7, the first value is 2525 MHz, the secondvalue is 2645 MHz, and the predetermined value for the MSD value is 30.1dB.
 7. The terminal of claim 1, wherein when the E-UTRA is configuredwith the E-UTRA operating bands 5 and 7, the NR is configured with theNR operating band n78, the first operating band is the E-UTRA operatingband 5, the first value is 834 MHz, the second value is 879 MHz, and thepredetermined value for the MSD value is 30.2 dB.
 8. The terminal ofclaim 1, wherein when the E-UTRA is configured with the E-UTRA operatingbands 1 and 5, the NR is configured with the NR operating band n78, thefirst operating band is the E-UTRA operating band 1, the first value is1932 MHz, the second value is 2122 MHz, and the predetermined value forthe MSD value is 18.1 dB.
 9. The terminal of claim 1, wherein when theE-UTRA is configured with the E-UTRA operating bands 1 and 3, the NR isconfigured with the NR operating band n77, the first operating band isthe E-UTRA operating band 3, the first value is 1775 MHz, the secondvalue is 1870 MHz, and the predetermined value for the MSD value is 8.5dB.
 10. The terminal of claim 1, wherein when the E-UTRA is configuredwith the E-UTRA operating bands 1 and 7, the NR is configured with theNR operating band n78, the first operating band is the E-UTRA operatingband 7, the first value is 2507.5 MHz, the second value is 2627.5 MHz,and the predetermined value for the MSD value is 9.1 dB.
 11. Theterminal of claim 1, wherein when the E-UTRA is configured with theE-UTRA operating bands 1 and 3, the NR is configured with the NRoperating band n78, the first operating band is the E-UTRA operatingband 1, the first value is 1935 MHz, the second value is 2125 MHz, andthe predetermined value for the MSD value is 2.8 dB.
 12. The terminal ofclaim 1, wherein when the E-UTRA is configured with the E-UTRA operatingbands 1 and 3, the NR is configured with the NR operating band n79, thefirst operating band is the E-UTRA operating band 1, the first value is1950 MHz, the second value is 2140 MHz, and the predetermined value forthe MSD value is 3.6 dB.
 13. The terminal of claim 1, wherein when theE-UTRA is configured with the E-UTRA operating bands 1 and 5, the NR isconfigured with the NR operating band n78, the first operating band isthe E-UTRA operating band 5, the first value is 840 MHz, the secondvalue is 885 MHz, and the predetermined value for the MSD value is 3.1dB.
 14. The terminal of claim 1, wherein when the E-UTRA is configuredwith the E-UTRA operating bands 5 and 7, the NR is configured with theNR operating band n78, the first operating band is the E-UTRA operatingband 5, the first value is 830 MHz, the second value is 875 MHz, and thepredetermined value for the MSD value is 3.3 dB.